java - Java线程什么时候空闲？

Question

只是通过 Java 查看 thread states :

NEW
A thread that has not yet started is in this state.
RUNNABLE
A thread executing in the Java virtual machine is in this state.
BLOCKED
A thread that is blocked waiting for a monitor lock is in this state.
WAITING
A thread that is waiting indefinitely for another thread to perform a particular action is in this state.
TIMED_WAITING
A thread that is waiting for another thread to perform an action for up to a specified waiting time is in this state.
TERMINATED
A thread that has exited is in this state.

怎么没有idle状态呢？或者什么状态最接近于空闲线程？
RUNNING 是否在 CPU 上执行？

Answer 1

撇开 NEW 和 TERMINATED 不谈，“idle”的意思是“等待东西”。这包括以下所有内容:

BLOCKED
WAITING
TIMED_WAITING

Is RUNNING but just not executing on CPU?

没有RUNNING，只有RUNNABLE。这大致意味着“有事情要做”，但没有说明线程现在是否实际上正在运行(它可能正在等待核心可用)。